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CHAPTER 1 INTRODUCTION
The V850/SA1 is a product in NEC’s V850 Family of single-chip microcontrollers designed for real-time control
operations. This chapter presents a brief overview of the V850/SA1.
1.1
General
The V850/SA1 is a 32-/16-bit single-chip microcontroller that includes the V850 Family’s CPU core, and peripheral
functions such as ROM/RAM, a timer/counter, a serial interface, an A/D converter, a timer, and DMA, controller.
In addition to its highly real-time responsiveness and one-clock-pitch execution of instructions, the V850/SA1
includes a hardware multiplier for multiplication instructions, saturation instructions, and bit manipulation instructions,
all of which are instructions suited for digital servo control applications. As a real-time control system, this device
provides a high level of cost performance suitable for applications ranging from low-power camcorders and other AV
equipment to portable telephone equipment such as cellular phones and PHS phone systems.
1.2
Features
{
Number of instructions: 74
{
Minimum instruction execution time
59 ns (when main system clock (f
XX
) is operating at 17 MHz)
30.5
µ
s (when subsystem clock f
XT
is operating at 32.768 kHz)
{
General-purpose registers
32 bits
×
32 registers
{
Instruction set
Signed multiplication (16
×
16
→
32): 1 or 2 clocks
(able to execute instructions in parallel continuously without creating any register
hazards).
Saturation operations (overflow and underflow detection functions are included)
32-bit shift instruction: 1 clock
Bit manipulation instructions
Load/store instructions with long/short format
{
Memory space
16 Mbytes of linear address space (for programs and data)
External expandability: expandable to 4 Mbytes
Memory block allocation function: 2 Mbytes per block
Programmable wait function
Idle state insertion function
Summary of Contents for V850/SA1 mPD703015
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